As she so simply puts it, "Eat too many calories for the number you use, and on come the pounds. Food tempts us everywhere, even in places like business supply stores, bookstores and libraries. It comes in larger and larger portions. And we are expected to snack all day long. "

Clearly, policy makers also agree.

After all, fast food chain menus in New York City are displaying calories , not carbohydrate or fat grams.